Effect of Aharonov-Bohm Phase on Spin Tunneling

Details Effect of Aharonov-Bohm Phase on Spin Tunneling Effect of Aharonov-Bohm Phase on Spin Tunneling

1999-12-07

arxiv.org/abs/quant-ph/9912025v2

Mod. Phys. Lett. B, 14 (2000) 919

Physics

Quantum Physics

12 pages, no figure

Scientific paper

The role of Aharonov-Bohm effect in quantum tunneling is examined when a potential is defined on the $S^1$ and has $N$-fold symmetry. We show that the low-lying energy levels split from the $N$-fold degenerate ground state oscillate as a function of the Aharonov-Bohm phase, from which general degeneracy conditions depending on the magnetic flux is obtained. We apply these results to the spin tunneling in a spin system with $N$-fold rotational symmetry around a hard axis.

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